A project manager is currently estimating the team resources, materials, equipment, and supplies needed for the project activities. Which of the following would BEST assist the project manager in accurately estimating these resources?
Employing parametric estimating to determine resource needs based on statistical relationships from historical data.
Applying analogous estimating by comparing the resources required for the project to those of a previous similar project.
Using bottom-up estimating to aggregate resource estimates from the activity level to the work package level and up.
Relying on expert judgment alone to predict the resources needed for the project without any formal estimation technique.